The only thing I’m an expert in, is what I do for a living. And I am an expert. That’s not bragging, it’s simply the truth - I’ve been called on more than one occasion to be an expert witness.
But, APG, I think it’s worth remembering, it seems to me that most people on AB appear to think they’re an expert on pretty much everything if most of the posts are anything to go by - they’re not, but they like to think they are. A wise man once said opinions are like a_rseholes; every ones got one.